Year	%
1993	8.77
1994	12.56
1996	12.21
1997	13.28
2001	11.11
2002	10.82
2005	10.68
2007	9.97
2008	9.85
2009	9.83
2010	8.62
2011	8.54
2012	8.59
2013	8.43
2014	7.75
2015	7.2
2016	6.26
2017	5.99
2018	5.85
2019	7.44
2020	5.89
2021	6.46